Cov khoom lag luam tshwj xeeb qib (PSL) feem ntau txiav txim siab cov khoom siv ntawm API 5L cov kav dej, uas muaj feem xyuam rau nws lub zog, toughness thiab kev ua tau zoo nyob rau hauv ntau yam kev ua haujlwm, thiab cov khoom siv tshuab no yog tus yuam sij rau kev ntsuas seb lub raj xa dej tuaj yeem tiv taus qhov siab, qhov kub thiab txias. thiab ib puag ncig kev ntxhov siab hauv kev thauj roj thiab roj.
Qhov cuam tshuam rau lub zog
Ib qho ntawm cov teebmeem tseem ceeb ntawm PSL ntawm cov khoom siv kho tshuab ntawm API 5L cov kav dej yog qhov yuav tsum tau muaj zog thiab tensile zog. Piv nrog rau tib qib API 5L PSL 1 kav dej, qhov tsawg kawg nkaus yield zog thiab tensile zog qhov tseem ceeb ntawm PSL 2 kav feem ntau yog siab dua. Siv API 5L X65 ua piv txwv, qhov tsawg kawg nkaus lub zog ntawm PSL 2 kav yog 450 MPa (65, {9}} psi) thiab lub zog tensile yam tsawg kawg nkaus yog 535 MPa (77, 000 psi), thaum lub Lub zog xav tau ntawm tib qib hauv PSL 1 kuj qis dua me ntsis. Qhov kev muaj zog ntxiv no ua rau PSL 2 cov kav dej tuaj yeem tiv taus siab dua sab hauv thiab kev thauj khoom sab nraud, ua rau lawv tsim nyog rau cov ntawv thov uas xav tau lub zog, xws li cov kav dej siab lossis cov av qeeg, muab kev tiv thaiv kev nyab xeeb ntau dua rau cov kav dej.
Kev cuam tshuam rau Toughness
Toughness kuj yog qhov tseem ceeb hauv PSL cuam tshuam rau cov khoom siv kho tshuab ntawm API 5L kav. PSL 2 cov kav dej yuav raug txhawb nqa yooj yim V-notch cuam tshuam kev ntsuas los ntsuas cov khoom muaj peev xwm nqus tau lub zog thiab tiv thaiv kev puas tsuaj nyob rau hauv cov khoom hnyav. Qhov kev sim no yog qhov tseem ceeb tshwj xeeb rau cov kav dej ua haujlwm hauv qhov chaw tsis muaj qhov kub thiab txias los yog raug kev ntxhov siab tam sim ntawd. Lub toughness yuav tsum tau ntawm PSL 2 cov kav dej kom ntseeg tau tias lawv tswj cov txheej txheem kev ncaj ncees nyob rau hauv cov kev ua haujlwm nyuaj xws li cov kav dej kaw thiab hloov siab sai sai, yog li txhim kho cov kav dej kom tsis txhob tawg tawm thiab txhim kho kev nyab xeeb tag nrho.
Kev cuam tshuam rau Ductility
PSL qib kuj tseem cuam tshuam rau qhov ductility ntawm cov raj xa dej, uas feem ntau ntsuas los ntawm qhov elongation hauv kev ntsuas tensile. PSL 2 cov kav dej feem ntau muaj cov kev cai elongation nruj dua los xyuas kom meej tias cov khoom tsis poob thaum plastically deformed. Zoo ductility yog qhov tseem ceeb nyob rau hauv cov xwm txheej uas cov raj xa dej tuaj yeem ntsib kev txav mus los hauv av, lossis cov ntawv thov sab nrauv yuav tsum tau hloov mus rau nthwv dej thiab dej. Nws ua rau cov raj xa dej kom zoo dua qub rau qhov nyuaj sab nraud quab yuam ib puag ncig thiab txo qhov kev pheej hmoo ntawm kev puas tsuaj.
API 5L L360 Seamless Dub Steel Yeeb Nkab
